US3502417A - Arrangement for improving the writing properties of fiber-point pens and the like - Google Patents

Arrangement for improving the writing properties of fiber-point pens and the like Download PDF

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Publication number
US3502417A
US3502417A US680420A US3502417DA US3502417A US 3502417 A US3502417 A US 3502417A US 680420 A US680420 A US 680420A US 3502417D A US3502417D A US 3502417DA US 3502417 A US3502417 A US 3502417A
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US
United States
Prior art keywords
point
writing
barrel
former
protective cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US680420A
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English (en)
Inventor
Heinrich Hartmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Geha Werke GmbH
Original Assignee
Geha Werke GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Geha Werke GmbH filed Critical Geha Werke GmbH
Application granted granted Critical
Publication of US3502417A publication Critical patent/US3502417A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00—Combinations of writing implements with other articles
    • B43K29/06—Combinations of writing implements with other articles with sharpening devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/08—Protecting means, e.g. caps
    • B43K23/12—Protecting means, e.g. caps for pens
    • B43K23/126—Protecting means, e.g. caps for pens with clips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/08—Protecting means, e.g. caps
    • B43K23/12—Protecting means, e.g. caps for pens
    • B43K23/128—Protecting means, e.g. caps for pens with spring means

Definitions

  • the invention provides an improved fiber-point pen and the like with which a point former containing a cavity is associated.
  • the cavity comprises two different coaxial coned sections of which the inner apical section serves to reshape the writing point of the writing utensil when the same is not in use and when its protective cap is screwed on or oil.
  • This invention relates to a writing utensil comprising a fiber bundle composed of individual synthetic fibers.
  • Well known fiber-point pens contain a pin-shaped rigid writing element consisting of a bundle of ultrafine fibers of nylon or the like embedded in plastics. That is, the synthetic fibers are axially interconnected within a holding means by a plastic bond. The synthetic fibers in the writing point are shortened on the outer periphery relative to the fibers lying on the bundle axis. This bundle forms a conical writing point for conveying the ink by capillary action from a supply inside the pen through the writing point to the paper. Cavities which are located in the writing points to produce the capillary action cause the points to wear away. These writing points are compressible and thus lose their original generally conical shape after a relatively short period of use.
  • Another object of this invention is to reshape the writing point consisting of a bundle of fibers by using a means to uniformly maintain the axial pressure on the fiber bundle during nonuse.
  • This point forming means maintains an axial pressure uniformly on the fiber bundle during nonuse so that any deformity in the writing point will be eliminated through reshaping.
  • the cone-shaped cavity includes a bigger side of which faces the writing point and has a shape corresponding to the shape of the undeformed writing point. The writing point is inserted into the cavity where it may be reformed under axial pressure.
  • This protective cap is such that the writing point is under axial pressure when the writing pen is not in use.
  • One specific embodiment includes a mounting for the protective cap having the cone-shaped cavity axially movable through the use of a spring means.
  • the point forming member disposed in the interior of the protective cap is elastically supported against the inner side of the head of the protective cap.
  • a further embodiment provides for at least one window-like opening in the protective cap to observe the region of the point forming member disposed in the interior of the protective cap.
  • the point forming member is constructed of a clear transparent plastic material to provide means for observing the writing point in contact with the said point forming member.
  • FIGS. 1 and 2 are two part sectional side views of point formers that constitute separate self-contained elements, each point former being shown facing the writing element of a writing utensil that is to be reshaped;
  • FIGS. 3 to 5 are similar views showing point formers built into protective caps of writing utensils, each cap being shown facing the writing point of the writing utensil to which the cap belongs;
  • FIG. 6 is an axial section of a different embodiment of a cap containing a point former
  • FIG. 7 is a part sectional side view of a point former adapted to be screwed into the rear end of a barrel;
  • FIG. 8 is an axial section of a writing utensil adapted for the reception of a replaceable ink storage cartridge insertable into the barrel with a tight friction fit
  • FIG. 9 is an axial section of a writing utensil in which a replaceable ink storage cartridge is positively located, the writing utensil having its protective cap fitted with a point former.
  • FIGS. 1 and 2 show a point former which has a body 1 of circular cross section made of plastics, metal or some other suitable hard material. At one end this body 1 is provided with a central coned recess or cavity comprising two different coaxial coned sections, i.e., an inner apical section 2 and an outer section 3.
  • the inner apical section 2 of the cavity has a cone surface which roughly corresponds to the original cone shape of the writing point 8 of a writing utensil, or it may have a slightly more acute cone angle than that of a writing point that has not yet been worn and deformed.
  • the outer coned section 3 of the cavity opens outwardly and has substantially the shape of a truncated cone having the same cone angle as the taper end 5 of the barrel 4 of the writing utensil.
  • a shoulder 6 is formed between the two coned sections 2 and 3 of the cavity.
  • the cylindrical body 1 of the point former is extended to form a shaft 7 which is provided with longitudinal fiutings or has a surface roughened in some other way to facilitate holding the point former for use.
  • the writing utensil which is to be reshaped in the illustrated embodiments is a fiber point pen of conventional kind comprising a barrel 4 with a conically tapering end 5.
  • the writing point 8 of a pin-shaped writing element projects from an axial bore in the tapering end 5 of the barrel.
  • the writing element may in the known manner consist of a bundle of very fine filaments, such as nylon, embedded in a synthetic plastics matrix and thus forming a solid unit.
  • the portion of the writing element which lies in the outlet bore at the tapering end 5 of the barrel 4 is embraced by a sleeve 9 of metal or plastics from which about 3 mm. of the writing point 8 freely project.
  • the writing point 8 When the writing point 8 is deformed or so worn that it has lost its original shape, and thus, when used for writing. produces uneven lines which can no longer be controlled to be fine or thicker according to the angle at which the pen is held, then the end of the writing utensil with the writing point 8 is pressed firmly into the cavity in the point former.
  • the deformed point 8 of the writing element is thus pressed into close contact with the wall of the inner section 2 of the cavity, whereas the taper end 5 of the barrel 4 fits into the outer section 3 of the cavity.
  • the pressure of the writing point 8 against the internal wall of the inner section 2 of the cavity reshapes the deformed writing point 8 which thus reassumes the shape which it possessed when it was new.
  • the shaping effect of the point former can be improved by repeatedly rotating the inserted writing point 8 several times in the cavity. The rotary movements smooth the freshly formed surface and press projecting nylon fibers back into the embedding matrix of the writing point 8.
  • the surface of the inner section 2 is formed with undulations extending in the direction of the cone axis and the crests of the undulations which project into the interior of the coned section 2 are provided with a thin layer of emery 10.
  • the layer of emery has the effect of rubbing projecting ends of nylon filaments and small particles of material off the coned surface of the writing point 8 and of thereby smoothing down the surface to reshape the original shape of the writing point 8.
  • the cylindrical body 1 of the point former is provided with several, for
  • the crests of the undulations in the inner section 2 of the cavity may be shaped to form small cutting edges which act on the coned surface of the writing point 8 in the same way as the layer of emery 10.
  • a layer of emery 10 may also be applied to the internal concd surface of the section 2 when the same is smooth.
  • the point former is resiliently mounted on a precompressed coil spring 17 inside a protective cap 12 of the writing utensil.
  • the cylindrical body 1 containing the coned sections 2 and 3 of the cavity is rearwardly formed with a squaresectioned tang 13 which is slidably received into a corresponding square-scctioned blind hole 14 in a rear cover member 15 of the protective cap 12 which simultaneously and in conventional manner serves for securing a clip 16 when screwed into the rear end of the protective cap 12.
  • the precompressed coil spring 17 bears with one end against the inside surface of a ring 18 which carries the threads for securing the cover member 15 of the protective cap 12 and with the other end against an external collar 19 on the cylindrical point former body 1.
  • This coil spring 17 urges the point former forwards into contact with a sleeve 20 firmly secured inside the protective cap 12.
  • the protective cap 12 When the protective cap 12 is pushed over the writing end of the writing utensil the writing point 8 is received into the inner coned section 2 of the point former, whereas the taper end 5 of the barrel 4 is received resiliently into the outer section 3 of the cavity.
  • the point former exerts a continuous reshaping effect whilst the utensil is not in use, as long as the protective cap remains in position on the writing end of the barrel 4.
  • the reshaping effect which in this instance may also be assisted by the provision of a layer of emry 10 or by cutting elements, as in the embodiment described by reference to FIG.
  • prodtl tective cap 12 when being placed on, or removed from, the end of the barrel 4 is slightly rotated as is usually done. not only in the case of protective screw caps, but also when threadless protective caps retained merely by friction are used.
  • the arrangement of the point former shown in FIG. 4 differs from that in FIG. 3 merely in that the precompressed coil spring 17 has been omitted and that the point former is rigidly mounted inside the protective cap 12, i.e., that it is neither rotatable nor axially yieldable.
  • the point former body 1 is rotatably located in a central bore 21 in the rear cover member 15 of the protective cap 12, but it cannot axially yield. Its rear extension projects from the outside of the cover member 15 and forms a twirling knob 22. By twirling this knob when the protective cap 12 is in position, the writing point 8 of the writing utensile can be reshaped to the desired original cone form and at the same time its surface smoothed.
  • the body 1 of the point former which may be either rigidly fitted or yieldingly located into the protective cap 12, consists of a clear transparent plastics material. Openings resembling windows 23 are cut into the wall of the protective cap 12 on diametrically opposite sides in the region where the point former is fitted. These windows 23 permit. the reshaping process to be observed for the purpose of checking that the writing point 8 is being properly shaped as desired.
  • the location of the point former inside the protective cup 12 of the writing utensil is particularly convenient because the point 8 remains in the reshaping cavity of the point former for longer periods and is therefore more effectively reshaped, and because the point former, being permanently fitted into the protective cap 12, cannot be lost.
  • the body 1 of the point former is provided with an external screw thread 24 and removably screwed into a female thread cut into the rear end 4a of the barrel 4.
  • a knurled knob 25 of a diameter larger than that of the body 1 of the point former is located on the outside and forms an attractive rear termination of the barrel 4 of the writing utensil.
  • the point former also has the effect of helping to prevent the ink in the writing point 8 from drying out.
  • the writing utensil comprises a barrel in the form of a hollow plastics or metal shaft which is closed at one end and slightly tapered at the other, and an ink-containing cartridge replaceably inserted into the barrel 30.
  • the cartridge has a rigid or semirigid body made of plastics enclosing a supply of ink in an absorbent wad.
  • the latter communicates with a pin-like writing element resembling a wick which may consist of a bundle of ultrafine filaments, such as nylon filaments, embedded in a plastics matrix and forming an integral element in the manner that is conventional in fiber point writing utensils.
  • the forward coned end of the pin-shaped writing element which projects about 3 mm.
  • the external diameter of the ink cartridge 40 fits into the interior of the barrel 30 in such a way that some force is needed to insert it into the barrel 30, so that the ensuing friction will prevent the cartridge from rotating or from axially moving inside the barrel 30.
  • a point former as hereinabove described may then be pressed over the writing point 8 and simultaneously rotated to restore the deformed and worn writing point 8 to its original coned shape without causing the cartridge 40 to participate in the rotary motion.
  • the external diameter of the cylindrical shell of the ink cartridge 40 is a few millimeters less than the internal diameter of the barrel 30 so that a slight annular clearance x remains between these two members.
  • the ink cartridge 40 is frictionally held in place by an internal bulge 33 in the rear end of the barrel 30 which prevents the cartridge 40 from accidentally being dislodged towards the forward end of the barrel 30 and from slipping out of the barrel 30 when the pen is being used.
  • the reduced rear end of the cartridge 40 is formed as a hexagon 40b and fits into a correspondingly shaped recess in the closed rear end of the barrel 30.
  • the described positive engagement of the cartridge 40 by the barrel 30 prevents the cartridge from being rotated when the writing point 8 is being reshaped by twirling a point former applied to the writing point 8.
  • the point former body 1 is shown nonrotatably and unmovably built into a protective cap 12 mounted on the barrel with the point former containing the writing point 8.
  • the point former consists of plastics, metal or some alternative suitable hard materials and comprises a cylindrical body with a central cavity formed by two differently coned sections 2 and 3.
  • the cone surface of the inner section 2 corresponds to the cone shape of the writing point 8 of the writing utensil when it is new, the object being to restore the worn and deformed writing point 8 to this original shape.
  • the exposed edge of the sleeve 9 which embraces the writing point 8 extends into the corner formed at the junction between the inner coned section 2 and the outer coned section 3 of the cavity when the point former is applied to the writing point 8 for reshaping the same, i.e., when the protective cap 12 is applied to or screwed onto the barrel 30 of the pen.
  • the point former 1 is fixed in the protective cap 12 with a press fit or by attaching it to the rivet or screw required for securing a clip 16 to the cap 12, or in some other suitable way in such a manner that when the cap 12 is pushed on the end of the barrel or pulled off the barrel and simultaneously rotated for screwing it on or unscrewing it from a threaded barrel, the point former cannot rotate inside the cap 12.
  • the point former may otherwise be contrived as already described.
  • the invention may be embodied in other ways and comprise other forms of construction than those that have been particularly described with reference to the accompanying drawings. More particularly, besides the abovedescribed embodiments shown in FIGS. 8 and 9 other possibilities are available for locating the replaceable ink cartridge inside the barrel by friction and/ or by interengaging parts in such a way that when the point former is rotated for shaping the writing point the cartridge will not participate in such rotation.
  • the writing point and the corresponding point former may also have a blunt truncated cone shape, the point being formed to receive a small terminal fiat instead of a point and the edge of the flat being used for writing.
  • a fiber-point writing utensil comprising:
  • the larger forming surface has a shape corresponding to the shape of the undeformed writing point
  • the protective cap fits over the writing point and axial pressure may be exerted on the writing point when the larger forming surface is juxtaposed the writing point to reshape the writing point after it has been deformed during use.
  • the bundle of fibers includes a plastic bond material to secure the fibers together and capillary channels located between the individual fibers and plastic bond material,
  • the synthetic fibers on the outer periphery are shortened relative to the fibers on the bundle axis.
  • the bundle of fibers includes a plastic bond material to secure the fibers together and capillary channels located between the individual fibers and plastic bond material,
  • the synthetic fibers on the outer periphery are shortened relative to the fibers on the bundle axis.
  • the point forming member is composed of a clear, transparent plastic material and the protective cap includes a window means to observe the contact between the point forming member and the writing point.
  • the bundle of fibers includes a plastic bond material to secure the fibers together and capillary channels located between the individual fibers and plastic bond material,
  • the synthetic fibers on the outer periphery are shortened relative to the fibers on the bundle axis.

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  • Nonmetallic Welding Materials (AREA)
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US680420A 1966-11-07 1967-11-03 Arrangement for improving the writing properties of fiber-point pens and the like Expired - Lifetime US3502417A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEG0048380 1966-11-07
DEG0048850 1966-12-24

Publications (1)

Publication Number Publication Date
US3502417A true US3502417A (en) 1970-03-24

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ID=25978855

Family Applications (1)

Application Number Title Priority Date Filing Date
US680420A Expired - Lifetime US3502417A (en) 1966-11-07 1967-11-03 Arrangement for improving the writing properties of fiber-point pens and the like

Country Status (10)

Country Link
US (1) US3502417A (cs)
BE (1) BE706008A (cs)
CH (1) CH468884A (cs)
CS (1) CS151463B2 (cs)
DE (2) DE1511346B1 (cs)
DK (1) DK126849B (cs)
GB (1) GB1153019A (cs)
NL (1) NL6715039A (cs)
NO (1) NO124358B (cs)
SE (1) SE326385B (cs)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086312A (en) * 1976-04-08 1978-04-25 Glasrock Products, Inc. Writing pen core having an integral nib and ink reservoir and method of manufacture
US4093769A (en) * 1976-02-18 1978-06-06 Glasrock Products, Inc. Capillary body and method of producing the same
US4104781A (en) * 1976-06-10 1978-08-08 Glasrock Products, Inc. Method of manufacturing a marking pen having a nib and an ink reservoir integral therewith
US4119756A (en) * 1976-06-10 1978-10-10 Glasrock Products, Inc. Method of manufacturing a marking pen having a nib and an ink reservoir integral therewith
US4380403A (en) * 1980-01-19 1983-04-19 J. S. Staedtler K.G. Closure cap for a writing instrument
US4643605A (en) * 1983-11-28 1987-02-17 Iwasaki Kosei Device for preventing drying of nib of cartridge type pen
US4844642A (en) * 1985-05-27 1989-07-04 Pilot Ink Co., Ltd. Cap for writing equipment
US5971647A (en) * 1998-05-12 1999-10-26 Loulourgas; Demetre Writing device cap
US20070031176A1 (en) * 2005-08-02 2007-02-08 Gerard Gieux Cap for a pencil, in particular a cosmetic pencil, incorporating a pencil-sharpener, and pencil, in particular cosmetic pencil, fitted with a cap of this kind

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0375856A3 (en) * 1988-10-21 1991-11-06 Ikeda Industry Corporation Improvement in or relating to an eyeliner applicator

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US631000A (en) * 1896-02-27 1899-08-15 Joseph A Symonds Collapsible-tube brush.
DE374350C (de) * 1923-04-23 George Adam Faik Bleistiftschoner mit im Innern angebrachten Rauhungen zum Anschaerfen der Mine
GB307198A (en) * 1928-02-20 1929-03-07 Reginald Greaves Improvements in or relating to collapsable tubes or containers
US2065800A (en) * 1933-05-16 1936-12-29 Freeman Samuel Lipstick
US2642039A (en) * 1950-05-22 1953-06-16 Jerome R Cox Eyebrow pencil
US2782438A (en) * 1955-02-18 1957-02-26 Dupli Color Products Company I Sealed fountain brush
US3094736A (en) * 1962-03-27 1963-06-25 United States Filter Corp Marking device
US3274975A (en) * 1964-11-09 1966-09-27 Parker Pen Co Ball point pen incorporating a point reconditioning device
CH422577A (fr) * 1965-08-06 1966-10-15 Ananda Anlageanst Pointe de stylo-feutre
US3355239A (en) * 1965-10-22 1967-11-28 Almar Ind Inc Marking device
US3365744A (en) * 1965-01-26 1968-01-30 Foyer & Cie Le Tracing implements

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140505A (en) * 1962-07-06 1964-07-14 Shimamura Shigeki Writing pen
DE1934512A1 (de) * 1969-07-08 1971-01-21 Junginger Dipl Ing Werner Anordnung zum Zusammenfuegen von Behaeltern

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE374350C (de) * 1923-04-23 George Adam Faik Bleistiftschoner mit im Innern angebrachten Rauhungen zum Anschaerfen der Mine
US631000A (en) * 1896-02-27 1899-08-15 Joseph A Symonds Collapsible-tube brush.
GB307198A (en) * 1928-02-20 1929-03-07 Reginald Greaves Improvements in or relating to collapsable tubes or containers
US2065800A (en) * 1933-05-16 1936-12-29 Freeman Samuel Lipstick
US2642039A (en) * 1950-05-22 1953-06-16 Jerome R Cox Eyebrow pencil
US2782438A (en) * 1955-02-18 1957-02-26 Dupli Color Products Company I Sealed fountain brush
US3094736A (en) * 1962-03-27 1963-06-25 United States Filter Corp Marking device
US3274975A (en) * 1964-11-09 1966-09-27 Parker Pen Co Ball point pen incorporating a point reconditioning device
US3365744A (en) * 1965-01-26 1968-01-30 Foyer & Cie Le Tracing implements
CH422577A (fr) * 1965-08-06 1966-10-15 Ananda Anlageanst Pointe de stylo-feutre
US3355239A (en) * 1965-10-22 1967-11-28 Almar Ind Inc Marking device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093769A (en) * 1976-02-18 1978-06-06 Glasrock Products, Inc. Capillary body and method of producing the same
US4086312A (en) * 1976-04-08 1978-04-25 Glasrock Products, Inc. Writing pen core having an integral nib and ink reservoir and method of manufacture
US4104781A (en) * 1976-06-10 1978-08-08 Glasrock Products, Inc. Method of manufacturing a marking pen having a nib and an ink reservoir integral therewith
US4119756A (en) * 1976-06-10 1978-10-10 Glasrock Products, Inc. Method of manufacturing a marking pen having a nib and an ink reservoir integral therewith
US4380403A (en) * 1980-01-19 1983-04-19 J. S. Staedtler K.G. Closure cap for a writing instrument
US4643605A (en) * 1983-11-28 1987-02-17 Iwasaki Kosei Device for preventing drying of nib of cartridge type pen
US4844642A (en) * 1985-05-27 1989-07-04 Pilot Ink Co., Ltd. Cap for writing equipment
US5971647A (en) * 1998-05-12 1999-10-26 Loulourgas; Demetre Writing device cap
US20070031176A1 (en) * 2005-08-02 2007-02-08 Gerard Gieux Cap for a pencil, in particular a cosmetic pencil, incorporating a pencil-sharpener, and pencil, in particular cosmetic pencil, fitted with a cap of this kind

Also Published As

Publication number Publication date
DE1511346B1 (de) 1970-02-12
DE1511348A1 (de) 1970-09-03
CH468884A (de) 1969-02-28
CS151463B2 (cs) 1973-10-19
BE706008A (cs) 1968-03-18
NO124358B (cs) 1972-04-10
SE326385B (cs) 1970-07-20
DK126849B (da) 1973-08-27
NL6715039A (cs) 1968-05-08
GB1153019A (en) 1969-05-21

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